This year OCDC its comming with the Energy Harvesting Gleanergy kit and I have already receive mine, it comes with two boards, a low power processor board and the harvesting board.

This year I am going to make a guitar tuner device capable of tunnig your guitar with out the worries of have a fresh battery for it, it will be a Gleanergy device, so that means also that you will never need a wall adapter for it, think you can use it anywhere you are.

The Gleanergy kit comes with a pretty robust processor board which has an awesome e-paper display, those displays use almost nothing of the energy this kit can harvest, the processor its also an ultra los power consumption.

So, back to this year project, a guitar tuner. to make it not that complicated you will indicate which strings of your guitar you want to tune, it will indicate if you need to turn the mechanism of that string clockwise or anticlockwise, and the you can continue and repeat the steps for the next string.

This device will be very similar in aspect to a traditional electronic guitar tuner but this one will not need extra batteries of a wall-adapter.

Next week i will post my impressions regarding the KIT and make some sketches of the Gleanergy guitar tuner. ;)

So its time to show you the final product, the Portable Baby Bottle Warmer, in the following video I will show this PBBW Works, i really enjoyed making this device, im really glad of what i have accomplished.

The PCBs finally arrive, and it is time to test if anything went wrong, or if we need to make the Rev-B of the board, It almost works as spect it but i decided to make some changes in the board to increase the specs. This the board with all the components on their respective places.

REV-A Front face

REV-B Back Face

The new specs will be that we can light the PBBW in more tones that just the Red, Green and Blue LEDs one at a time as I put a single resistor in the common anode of the RGB LED, in that configuration just one color of each RGB LED can be turn on at the same time, but if we add a resistor for each LED we could make some color combinations, like a nice rainbow contained in our device. I have also change the form factor of the Buzzer, now it will be a SMT.

So let me show you how the new schematic looks like:

SCHEMATICS REVB

And a 3D look of the board before send it to fabrication:

So now we are ready to send the GERBER Files for fabrication, and in a week from now you will see working.

So the electronic part of the project its going to be very simple, but a good look.
This circuit would drive the heater element by reading a temperature sensor and adjusting the heater activation accordingly, but the special effects, the visual and good look of this will be 8 RGB LEDs with a shape of a ring like in the image of the concept design idea, this board should also be capable of charging the battery and respond to a human interface, in this case 3 push-buttons.

This is the schematic i made for this task.

Portable Baby Bottle Warmer - Schematic REV-A

In order for this board to look nice i made it round, and its time to get it manufacture.

PCB - REV A

And this is the 3D model of it:

PCB - Front View

PCB - Back View

PBBW Assembly View

PBBW Explode View

I have already think of some improvement I can make to the project, so this will not be the final version. Wait for more...